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LSD in Modern Psychiatry Scaled

1cp LSD Vs. 1p LSD: What’s the Difference?

Giordano Novak

Giordano Novak

Medically reviewed by Giordano Novak, University of São Paulo on April 3rd 2022

Key Takeaways:

  • 1p LSD and 1cp LSD are two of the most popular forms of lysergic acid diethylamide, more commonly known as LSD.
  • 1p LSD and 1cp LSD produce similar effects to traditional LSD but have been modified chemically in order to provide a longer duration of action.
  • The dosage amounts for both substances are considered similar when ingested orally or sublingually, with higher doses providing stronger psychedelic experiences.
  • Both 1p LSD and 1cp LSD can produce perceptual changes such as heightened visuals, increased audio sensitivity, enhanced tactile sensations and synesthesia.


If you thought LSD was just LSD, well, you were wrong. You also have 1cp LSD and 1p LSD, but what makes these variations differ from each other, and why are they significant enough for you to know? In a world of wild psychedelics, it’s good to know.

Both 1cp and 1p LSD are versions of LSD that are also classed as a derivative and functional analog of LSD. Their effects are very similar to regular acid, although each of these variations can be said to be more potent than the original.

In this article, we will give you all the information we can on 1p LSD and 1cp LSD so that you can see what they are, how they differ and determine which form of acid is going to work best for you.


What is 1cp LSD?

1cp LSD, also known as 1-propionyl-lysergic acid diethylamide, is a NEW and relatively unknown form of lysergic acid diethylamide that has RECENTLY been made available to purchase [2].

The 1cp variation of the classic 1p LSD molecule contains an ADDITIONAL propionyl group at the 1-position on the indole ring, compared to 1p LSD.

The analytical and behavioural characterization of 1cp LSD has NOT been studied as extensively as 1p LSD in health and medical sciences. However, it is one of the research chemicals that has been used on mice and was shown to have SIMILAR effects as 1p [1].


Pro Tip: LSD, including 1cp LSD, is included under the Psychoactive Substances Act and is considered to be a controlled substance.


The high from 1cp is said to have a longer duration than 1p LSD and is especially potent when dabbed or injected intravenously. You will LIKELY experience an increase in visuals, sound sensitivity and tactile sensations.


What is 1p LSD?

1p LSD, also known as 1-propionyl-lysergic acid diethylamide, is a derivation of the classic LSD molecule. It contains an ADDITIONAL propionyl group at the 1 position on the indole ring.


The 1p variation of 1cp LSD has become increasingly popular, as it has been proven to be more potent, longer-lasting and generally LESS unpredictable than regular LSD.

There is some existing scientific literature on 1p LSD where it was part of a human serum-led study to determine the SIMILARITIES to standard acid [3]. Considering it is one of several new psychoactive substances, it was important to note any adverse psychological reactions.


Pro Tip: Like LSD, 1p is not addictive. However, detailed analytical characterizations have shown those with existing mental health issues should not use it.


The high from 1p LSD is said to have a similar duration to 1cp LSD, but is more POTENT when ingested orally or sublingually. You will likely experience auditory and visual hallucinations and HEIGHTENED tactile sensations and synesthesia.


Paul Simon LSD Quote (White)


What is the Difference Between 1p LSD and 1cp LSD?

The main difference between 1p LSD and 1cp LSD is in the potency. 1p LSD is much more potent than 1cp LSD, so it is important to exercise caution when taking either form of acid.

1cp has a SHORTER duration of effects and can be less predictable than 1p because it tends to produce FEWER visual and auditory hallucinations.

Unlike 1cp LSD, there is a 1p LSD microdose available, which can be useful for those looking to get the benefits of acid WITHOUT having to experience a full-on trip.

A microdose of 1p is usually around 1/10th of a regular dose, so it is IMPORTANT to ensure that you are taking the correct amount [4].


Best Place to Buy LSD Online in Canada

While 1p LSD is legal to buy in Canada, the legality of 1cp LSD is more of a GREY area due to its fairly unknown status as a designer drug. Regardless, if you’re looking to buy LSD in any form, it’s vital that you use a REPUTABLE seller that you know is going to provide a pure product.

The reason for this is that there are plenty of cases where dealers and sellers are looking to CUT costs and decide to lace their LSD with chemicals and filler ingredients that could have adverse effects and even lead to POISONING. This is why you need to be careful.

Our chosen seller is reliable, reputable, and trustworthy – so you’re ALWAYS going to get pure acid that hasn’t been tainted in any way.


To Conclude

When it comes to 1p LSD and 1cp LSD, there are a few key DIFFERENCES between them. 1cp is generally less potent than 1p and has shorter-lasting effects, while 1p tends to produce MORE visual and auditory hallucinations.

It’s also important to remember that 1cp is not as widely available as 1p and is NOT legal in all countries, making 1p the better option for those who WANT to experiment with acid.

Finally, it’s important to always buy from a REPUTABLE seller and make sure that you’re getting pure 1p or 1cp LSD without any additives or fillers – this could mean the difference between a GREAT experience and an adverse reaction.



1: Brandt SD, Kavanagh PV, Westphal F, et al. Return of the lysergamides. Pharmacy and Biomolecular Sciences. Part VI: Analytical and behavioural characterization of 1‐cyclopropanoyl‐ d ‐lysergic acid diethylamide (1CP‐LSD). Drug Testing and Analysis. 2020;12(6):812-826. doi:10.1002/dta.2789

‌2: Tanaka R, Kawamura M, Hakamatsuka T, Kikura-Hanajiri R. Identification of LSD Derivatives, 1cP-LSD, MIPLA and 1B-LSD in Illegal Products as Paper Sheet. YAKUGAKU ZASSHI. 2020;140(11):1405-1413. doi:10.1248/yakushi.20-00124

‌3: Grumann C, Henkel K, Brandt SD, Stratford A, Passie T, Auwärter V. Pharmacokinetics and subjective effects of 1P‐LSD in humans after oral and intravenous administration. Drug Testing and Analysis. 2020;12(8):1144-1153. doi:10.1002/dta.2821

‌4: Third Wave. Third Wave. Published July 15, 2020. Accessed December 31, 2022.

5: Walker-Journey, J. (2022, February 2). 11 Celebrities Whose Lives Were Changed by Psychedelics. Psychedelic Spotlight.


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